Nailing machine for strip flooring



June 1l, l929 D. J. DOUGHERTY NAILING MACHINE FOR STRIP FLOORING FiledMarch 23, 1927 INVENTOR mv/L J Doue/1ER TY Patented .lune 11, 1929.a

i i` mim Si? DANIEL J'. DOUGHERTY, .OF SNOHOMISH, WASHINGTON, ASSIGNOROF ,ONE-.THIRD T0 J. EDWARD GREGGRSON, OF SEATTLE, WASHINGTON. i' iMartine MACHINE ironl sienne` FLOORING. p'

Application filed March 23, 1927. Serial'No. 177,677.l I

Y' nailinor machines and articularl to machines of a type designed fornailing hard wood flooring of that character that is not provided withthe usual tongue and groove edges, but which is laid close and is nailedstraight through from the top;` such flooring is usually in strips aboutone-half inch thick and two inches wide and when laid the boards areplaced and then wedged tightly together and held by a few nails, then,after the vfloor` is completely laid, the

nails are driven in, row after row; being spaced about one-fourth inchfrom the edges of the boards at each side,

It is the principal object of the present invention to provide a machinefor nailing the boards after the flooring has been placed, and which'will loperate to advance automatically for proper spacingy of the nailsalong a row; that is, withflooring two inches wide, after being properlypositioned to drive a A nail one-fourth inch from the edge of the rstboard, the machine will be automat-ically advanced, afterthatnail isdriven,

to a position for driving the next nail one-I fourthfinch from theopposite side edge of the board, then after that nail is driven it willadvance ontor the next board to drive the nail one-fourth inch from itsedge, and so Ion down the row, moving irst one and one-'half inches andthen one-half inch.

Other objects 'reside in the-various details of constructionandrcombination of parts as is hereinafter described and specilicallypointed out in the claims terminating the specification. f

In accomplishing these objects, 1 have provided the improved details ofconstruction, the preferred forms of which are illustrated in theaccompanying drawings, wherein- Figure 1 is a side view,partly invertical section, o'lf a nailing machine embodied by this invention.

llig'ure 2 is a front view of the upper andl l lower portion or thesaine; one central portion being removed.

Figure '3 is aperspect-ive view ofthe base portion of the device. y j

Figure 4; is a perspective view of the nail delivery slide. 1

Figure 5 yis 'a vancing shoe. n y y v Figure 6 is an enlarged section online 6-6 in Figure 2. i

Figure 7 is aperspective yview of the advancing cam. fr Y l Referringmore in detail to the drawings- 1 designates', in its entirety, the baseportion vof thel device. This comprises a vertically extending metallicblock la with a lat'plate 1b fixed-toits lower end to extend rearwardlythereofwith respect to the direction of movement of the machine duringanailing perspective'view of the ad# operation. Fixedin the upperend'ofthe.

block 1n is a vertical tube 2 in which a plunger rod 3 is slidablycontained and which, atits upper end, is equipped with'av hand hold 4l,in the form of a knob, -where-4 by the plungermay be manually .raisedand then driven downwardly, and, at its lower the nails, as willpresently be described;

end, vhas a nail driving pin 5, fixed thereiny i by 'a set screw 6,which is adapted to driveV v Secured-to the upper end of the tube 2 is arearwardly diverted ybracket 8 and' revolubly contained therein is theyupper end` of a tube 9 which extends parallel with the tube 2 andwhich, kat its lower end, has a rod 9- .tixed therein as a continuationthereof which is contained revolubly within anopen.- ing 10 in asupporting brackctllthat is fixed tothe base member 11. Containedslid-vably within the upper end vof the tube-9 is a rod V12 providedwith aspiral groove 13 into which a'lug 14V formed in the side wall Aof thetube 9 is adapted' to slide as a means of providing a connection vwhereby the tube will be caused vto rotate when the rod 12 is movedreciprocally therein; AThis rod 12 is extended rigidly to an arniithatis xed to the upper end'ofV the plunger rod 3; the

connection providing that the rod `12 be moved upwardly and downwardlyin accordaiice with movement of the plunger, andv the groove 13 is vsoformed on the rod 12 that with each complete upward and downwardreciprocal movement of the plunger, the tube 9 will be rotated one-'halfturnforward and baclc y i.

Fixed inthe outer end of bracket 8' is a horizontally extending shaft 18and revof vrustro-conical form provided with a door 20 that may beopened for filling the device l withnails. Formed in the walls of thedrum neargits larger end are slots 2l Vthrough whichA the nails vmaytall intov a' funnel-,like receptacle 22 supported vfrom the tube 2 fordelivery through a tube 23 ontoa nail slide 24 that is also fixed to thetube 2. Thisslide extends first i downwardly and outwardlyand is thenbent at a right anglefaiid extends downwardly and inwardly to adjacentthe the rear side of the base la.

upper end of a nail receiving opening 25- in This opening communicateswith n a 'vertical .channel 26 through the vbase member ll.v The 'twopor tions of the slide 24 :are provided with longitudinally extendingslots 26 and 26 which permit the'passage therethrough of the nail yshanks but not their, head portions and the lowerend of'slot 26 isprovided withV an enlargement 26fL through which the heads may pass to4permit the nails to drop from the upper into Vthe n lower slot. Nailsdischarged from thefunnel tube 13 head first are, by

Vhas an'inwardlyturned lfinger 30 at its'liree s y vendprojecting intothe path of the nails, as

this slide construction, reversed and deliv-v ered into' the lower slidegroove in proper position for'nailing.

kThe nails as delivered .into the slot of the "lower Vslide are held,againstl feeding .into the machine-except as used, byl a spring plate2S that is fixed at one end by a screwn29 to the-side o'l the base blockla and which shown in fF igure v3. A short pin 31 is also 'sli'dablycontained in a laterally opening hole 32 in the base block,andthisengages,

at its outer end, with the spring plate and,

vplungerandlnail drivingpin 5 areagain lifted Afor the nextldrivingoperation. As the plungerr islitted, the pin -31 and finger moveinwardlyand the latter again holds backthe nails in the delivery slide so thatthey A"cannot flow freely into the opening 25.

The nail container l9.is provided at one jendwith a ratchet wheel 35adapted to be engaged by apawl 36 at the outer1 end o'a lever 3 7 thatisvpivotally mountedfrom the I fbracketrarm 8 by a pin 38 with the innerend Vof the lever extended upwardlyand inwardly to a position to beengaged by the yhandle member 4'with each downward, driving movement ofthe latter. I:Thisengagement of the handle piecewwith,y the'lever rocksthe latter to actuate 'the pawl and ratchet to revolve the drum 19-sothat nails will befed from the latter into the funnel 22 5 therebycontrolling the yfeed of the lby a hooked pawl 46 that is pivotallylattached to one arm 47t of abell crank mounted by a pivot pin 48 on thebracket 44; the other arm 47" ot' the bell crank is connectedoperatively to the lower end of a bar 49 that is slidably attached, bymeans cita collar 50 at its'upper end, about thelowerend portion of thetube 9. Mountedon this slide bar 49 is a rollei" 51 and this operates inrolling` Contact with the'edge of' a circular cam 52 that'isrevoluble'on the lower end of' .the rod 9" which isfixed 'in the'lower end oftube9. The hub portion'of this cam has a ratchet 53 adapted to beengaged by a .ratchet collar 54 that isjslidably keyed on ltherod 9 andwhich is pressed against' the tatably one-half turn.

The cam 52has two risesforined thereon which are at diametricallyopposite points,

as designatedrat 52 and 52h; the 'rise 521,V

being relatively high as con'ipffired tothe other. "This provides thatthe movement of the slide 49' when actuated by the. higher .part 52b ofthe cam will bejgi'eaterthan when c ica actuated by the rise 52l and therotative y movement of the knurled advancing wheels 40-41 producedthrough the bellcrank, ratchet and pawl connection with the slide 49 isgoverned accordingly. y

A bell crank-60 is alsorpivotally attached to thel outer end of thebracket 1l 'andk this has one arm attached' operatively to the low erend of the slide 49 and its other armpivot-l ally connected withlpresser foot 62 that engages the floor as aineansof supplementing thewheels 40541 iiiadvancing thedevice with each upward reciprocal movementof the slideg'the distance of advancement being in accordance with themovement of the slide as provided bythe two rises in the cam. A 'spring65 is fixed to .an arm .ot the ,bell crank to bear against the `root tohold it inyholding Contact with the lfloor, and thefoot has' a pluralityof pointed pins 67 thereon for engaging the fioorto prevent j slippageoff the shoe when pressure is-ap plied against it. justably mounted inthe bracket .'11 to limit the inward movement of the bell crank 60. Agauge bar is pivotally attached to the base, 'as in Figure, 2, with amarker 7l at its outer end, which is used asa means of gauging thespacing of the rows of nails and Also, a set screw 68 is ad i lWith thedevice properly set for starting,

at one edge of the board, the operator vfirst actuates the plunger 3-downwardly to displace the linger 30 orthe delivery of a nail from slide2linto opening 25. f He then grasps the knob land draws the plungerupwardly so that the nail drops Yinto the channel 2G. lHe AthenA drivesVthe plunger down so that the pin 5 at the lower end of the plungerdrives the nail completely in. rlhe plunger is then again raised toitsup'- per linnn-thereby rotating the tube 9 and cam 52 vso that the highrise 52b oit the cam will lift the slide 49 and actuate the bell cranksi7 and 60 to rotate the wheels 40 and el and also actuate the pressertoot 62 against the floor to advance the machine, through the fartherdistance of travel as provided by the cam, so that it is in properposition for driving a nail in the opposite edge of the board. rlheplunger is then driven downwardly to drive this nail, then as it isagain raised, the cam is again rotatably advanced to cause the lowerrise 52ZL to actuate the slide 49 to eiiect the advancement of themachine through its shorter distance of travel as provided by the camsopthat the machine will be advanced onto thenext board. Thus, themachine, as designed for two inch flooring boards, would be'alternatelyadvanced one and one-half inches and then one-half inch so vas toposition it for driving the nails one-fourth inch from the edges of theboards. For boards of a different width, cams 52 with their risesproperly formed for the desired spacing of Vnails could be provided forinterchangeable use on'the rod 9.

The machine as here shown is manually operated but it is apparentthat itcould be operated mechanically by a motor.

Having thus described my invention, what I claim as new therein anddesire to secure byvLetters-Patent, is: f

l. A nailing device of the character described, comprising a basemember, nail feeding and driving means on the base member, and mechanismoperable by successive resetting operations of the nail driving means`for alternately advancing the niachine through spacings of differentlength.

2. A device of the character described, comprising a. base member havinga nail guide channel and a lateral opening into the channel, a nailcontainer, a nailing device including a reciprocally movable plunger,means operable under control of the plunger for feeding nails from thecontainer vto the lateral openings, means operable by each retractivemovement of the plunger for admitting a single nail into the guidechannel, an

advancing means, and mechanism operatively connectingthe advancing meanswith the plunger whereby successive .retractive movements Aof theplunger will advance .the machine through spacings of differentV length,

3. In a devicefofA the character described, A'comprising va Abasemember, nail. feeding means mountedv on the vbase, a nailv driving meansincluding 'fa ".reciprocally movable plunger, an' advancing meanscomprising a cam adapted tobe rotatably advanced with each retracljiivemovement ot Athe plunger, and an advancing'foot operatively connectedAfor actuation byV the cam to advance theV machine betweenV successivenailing posi-` tions. y

Ll. In a device of the character described,

comprisingA a base member, nail feeding means mounted on the base, anail driving means including a reciprocally ymovable plunger, anadvancing means comprising a cam adapted. to be rotatably :advanced'witheach retractive movement'oi' the plunger, said means having risesv ofdiierent height thereon, a cain i"ollower,'and a presser shoeoperatively connected with the follower and adapted to be actuatedincidental to rotative movements otl the cam to advance the inachinethrough spacings of diil'erent length.

5. A nailing device'of the character deyscribed, comprising a basemember, a nailing devicemounted on the base including areciprocally'mounted plunger, a nail feeding device operable undercontrol of the plunger for vfeeding nails intoposition to be driven, arevolubly mounted tube, a rod reciprocally contained in the tube andconnected with the plunger to be reciprocated therewithv and havingconnection with the tube for rotating the latter incidental to reicovciprocation of the plunger and rod, a cam movement of the plunger, abracket lined to the base, a bell crank mounted onnthe bracket having apresser'foot'lixed to one end engageable with the floor and having aslide bar pivotally attached to its-other end,A

scribed, comprising a base member, a nail-v connected* withv the tubeand adapted v'to be i rotatably advanced with each retractive ing devicemounted on thebase including a y reciprocallyl mounted plunger, a nailfeeding device operable under control of the plunger for Vfeeding nailsinto position to be driven, a revolubly mountedtube, a rodV reciprocallycontained in the tube and con'- nected with the plunger to bereciprocated therewith andhaving connecting with the tube' for rotatingthe latterfncidental to recprocaton of the plunger and rod, acamconnected With the tube and-adaptedl to 'be rotatably I Aadvanced. Witheach* retractve movement of the plunger,l a pair of advancingzrollersattached toftheobase, a bell crank mountedv on thev base,abar-lhavngslifling floor-'and means operatively connectngthe bell crankfor rotating the advancing rollers, and 'a roller on t-hevslicle-engageable with the cam through Which the slide Will'beactuated YWitheach rotative" movement of the cam toeffect movement of thepr'esser'foot and advancing rollers whereby the machine willbefadv'anced from one vnailing position tofthehnext.' l

f Signed-at Everett, Washingt'on this' 16 i.

vitl-ay of Ma-rch, 1927.y

- DANI-,EL1 J. fnoUGVHintim?.

